FIRMWARE DETAILS
macOS 27.0
Build:
26A428Sep 14, 2026Delta OTARelease CandidateStable
View details
- Filename
121f7ac5136b1b1b89f3398d20ef1004441e9cdc0cd204fa7e630701b81b14bd.aea- File size
- 13.96 GB
- File type
- Delta OTA
- Download host
updates.cdn-apple.com- Link availability
- Not verified
Source reports active
- Last link check
- Not checked
- SHA-256
2d47f8a2dd049c0d151d51f734e02ec9f1fc80067fce73d4c7e8f983021c4508- SHA-1
Not reported- Required starting builds
24D2059- Board restrictions
Not reported
OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.
Compatible hardware (4)
Mac Studio (M3 Ultra, 2025)
UnknownMac15,14Mac Studio (M4 Max, 2025)
UnknownMac16,9MacBook Air (13-inch, M4, 2025)
UnknownMac16,12MacBook Air (15-inch, M4, 2025)
UnknownMac16,13Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.
Source provenance
AppleDBhttps://api.appledb.dev/ios/macOS%3B26A428-RC.json ↗
MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 12:56 PM UTC
Record fingerprint: 8305c639c5a60addec74ac2aabc81374